Atoms and nuclei

Radioactive decay

N = N0(½)t/t½

N amount remaining, N0 starting amount, t elapsed time, t½ half-life

Watch forCount halvings: 1/8 remaining means 3 half-lives.

Apply it · 2 questions

  1. Half-life from a drop in activityAtoms and nuclear physics · set 3 · hard
  2. Half-life: fraction remainingAtoms and nuclear physics · set 2 · easy